20184149 has 8 divisors (see below), whose sum is σ = 20640312. Its totient is φ = 19730880.

The previous prime is 20184097. The next prime is 20184163. The reversal of 20184149 is 94148102.

It can be written as a sum of positive squares in 4 ways, for example, as 5880625 + 14303524 = 2425^2 + 3782^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20184149 - 2¹² = 20180053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20184649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19259 + ... + 20279.

It is an arithmetic number, because the mean of its divisors is an integer number (2580039).

Almost surely, 2^20184149 is an apocalyptic number.

It is an amenable number.

20184149 is a deficient number, since it is larger than the sum of its proper divisors (456163).

20184149 is a wasteful number, since it uses less digits than its factorization.

20184149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 20184149 is about 4492.6772641711. The cubic root of 20184149 is about 272.2723132467.

The spelling of 20184149 in words is "twenty million, one hundred eighty-four thousand, one hundred forty-nine".